Does masturbation increase penis size?
No. Masturbation does not change the penis' size, either bigger or smaller. There is no scientific evidence that masturbation has any permanent effect on penis size.
According to scientific evidence, masturbation has no long-term effect on penis size. Masturbation causes an erection that expands the penis, but this is only temporary. After ejaculation, the penis will return to its normal size.
The size of the penis is mostly determined by genetic factors. During puberty and sometimes for a few years after, the penis grows. Most men's pens stop growing around the age of 18 or 19.
Testosterone is a necessary hormone for sexual development and functioning. During puberty, testosterone levels rise, which may aid in penis growth.
During masturbation, testosterone levels fluctuate as well. However, these modifications are minor and will have no long-term impact. Soon after ejaculation, testosterone levels return to normal.
Because both penis growth and masturbation are linked to testosterone levels, this could explain the widespread belief that masturbation affects penis size. But that is all it is: a myth and a misunderstanding.